I was at the NTPC training center at Delhi University this morning. I had a chance to try an old Prisma closed-circuit television camera (CCTV). My host drew some letters on a sheet of paper and placed them on the CCTV. I had my mobile phone with me and used the vOICe to gauge the shapes of the letters by pointing the phone camera at the CCTV monitor. I was successfully able to identify the shapes in most cases.

I was unable to name the letters except for the letter a which I remembered having a triangle. But that was due to my lack of practice more than anything else. Interestingly, this is the same way that I read braille. My usage of braille is not very frequent so I have to run my finger along the braille line one character at a time.